Aeroplane control switch



Sept. l, 1931. c. ROSATELLIv AEROPLANE CONTROL SW1-TCH Filed Dec. l1. 1930 Fatented Sept. 1k,

Pfarr-Lora@ TURIN,

Annortnnn CONTROL swi'roiiI Application filed December 11, 1930, Serial rlhis invention relates to a device enabling the instructor or first pilot of a double control school or tourist aeroplane to promptly disconnect the 'second control held by the candidate or passenger, by simply pulling on a flexible transmission of the usual type which operates the device. When it isV desired to place the second control again in working condition, it is sufficient to release the deXible transmission whereupon a spring of the device comes into action and besides clutching in again the second control returns special safety devices adapted to reinforce the coupling to their initial position.

rlhe accompanying drawings show by way of example a construction of the device. However, it is to be well understood that the arrangement of its component parts and the form thereof can be varied without departing from the spirit of this invention.

Figure 1 is a longtiudinal section of the switch means. j

Figure 2 is a further longitudinal section at right angles to Fig. 1.

Figure 3 is a view of one of the safety latches.

A liXed cylindrical casing is secured to the control lever holder l of the aeroplane and a slidable tube 3 is guided therein; the tube 3 has an upper liared portion forming a conical seat in which the socket 5 is fitted by its conical end and receives the control lever of the aeroplane.

A spring 6 pushes the slidable tube 3 through the `disc 14 against the control lever socket 5 so as to tighten it therein. rEhe control lever socket can turn in any direction, being universally mounted on the two pivots 7 and 8 at right angles to each other and fast with the tube 2.

In order to further secure thek socket 5 on the conical seat 4 of the slidable tube 3 so that it cannot overcome the resistance of the spring 6, two latches 9 are slidably mounted within the horizontal tube l0.

The latches 9 are provided with lateral cylindrical projections 11 engaged by the slots 2 of the strap 13 welded to the disc 14 to which the pressure of the spring 6 is applied. The slots 12 are inclined so that by No. 5oi,7i4, ami in muy october 9, 1930.

liftingr and lowering the strap the two latches 9 are pushed outwardly and inwardly. ,When these latter are pushed outwardv ly, they engage tivo opposed holes 15 bored both in the outerl Vhired casing 2 and in the inner slidable tube The disc 14 urged by the spring 6 bears against a'circular inner collar 16 on the tube 3 pushing this latter upwardly until the tivo latches 9 have entered' the -holes 15. The socket `5 is locked in its conical seat and the second pilot or the candidate can control the aeroplane.

ln' order to disconnect the second control,

,the iirst pilot or rinstructor pulls the wire 17 of the flexible (Bowden) transmission lowering the disc 14 which withdrawstlie latches 9 releasing the socket 5, this latter becoming loose and no longer affecting the aeroplaney In order to clutch in the secondf control. control the yflexible wire 17 is released; the

spring 6 will thenreturn all the'partsto their initial position.

I claim 1. .aeroplane control switch comprising in ercombination, a holder: for a control lever, a

tubular member fixed co-aXially in said holder, a tube telescopically mounted in said tubular member andhaving a flared outer end,

vva socket adapted to receive va control lever and means lfor displacing said'tube at will q so as to clear said socket from said tube.

'2. Aeroplane control switch comprising in combination, a holder for a control lever, a tubular member fixed co-aXial in said holder, a tube telescopically mounted in said tubu- :j

lar member and having a dared outer end, a socket adapted to receivey a control lever and connected 'by a `Cardan joint tosaid 'tubular member through slits in said tube, a conical annular projection on said socket adapted to it with the flared end of said tube, ineans for displacing said tube at will :so as to clear said socket from said tube and means for locking said tube with said tubular member when said annular projection is engaged by said conical flared portion.

3. Aeroplane control switch comprising in combination, a holder Jfor a control lever, a

rtubular member fixed co-axially in said liolder, a tube telescopically mounted in said tubular member and having at its outer end a conical seat, a socket adapted to receive a control lever, a Cardan j ointconnecting said socket with said tubular member, an annular conical projection on said socket adapted to fit with said conical seat, agspring for lifting saidtube and for bringing said conical seat into engagement with said annular projection, a traction member for lowering said tube, latches carried by said tube and adapted t0 engage with holes on said tubular member, when said tube is fully lifted and means operated by said traction member for disengaging said latches fro-1n the holes of said tubular member when the traction member is pulled. n

4. Aeroplane control switch comprising in combination, a holder for a control lever. a tubular member fixed co-axially in said holder, a tube telescopically mounted in said tubular member and having at its outer end a conical seat, a socket adapted vto receive a control lever, a Cardan joint connecting said Socket with said tubular member, an annular conical projection on said socket adapted to it with said conical seat, a spring for lifting said tube and for bringing said conical seat into engagement with said annular projection, a tubular guide member fixed transversely in said tube, latches movable in said guide member and adapted to engage with holes o-n said tubular member, when said tube is fully lifted, a strap across said guide member and having inclined slits engaging projections on said latches for releasing these latter from the holes on said tubular member, when said strap is lowered with respect to said guide member'and a flexible traction member secured to said strap. K

In testimony that l claim the foregoing as my invention, I have signed mv name.

CELESTINO RSATELLI.

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